tree: rename altcoins to blockchains

Signed-off-by: William Casarin <jb55@jb55.com>

pkgs/applications/blockchains/litecoin.nix

@@ -0,0 +1,51 @@
+{ stdenv, fetchFromGitHub
+, pkgconfig, autoreconfHook
+, openssl, db48, boost, zlib, miniupnpc
+, glib, protobuf, utillinux, qt4, qrencode
+, AppKit
+, withGui ? true, libevent
+}:
+
+with stdenv.lib;
+
+stdenv.mkDerivation rec {
+
+  name = "litecoin" + (toString (optional (!withGui) "d")) + "-" + version;
+  version = "0.16.3";
+
+  src = fetchFromGitHub {
+    owner = "litecoin-project";
+    repo = "litecoin";
+    rev = "v${version}";
+    sha256 = "0vc184qfdkjky1qffa7309k6973k4197bkzwcmffc9r5sdfhrhkp";
+  };
+
+  nativeBuildInputs = [ pkgconfig autoreconfHook ];
+  buildInputs = [ openssl db48 boost zlib
+                  miniupnpc glib protobuf utillinux libevent ]
+                  ++ optionals stdenv.isDarwin [ AppKit ]
+                  ++ optionals withGui [ qt4 qrencode ];
+
+  configureFlags = [ "--with-boost-libdir=${boost.out}/lib" ]
+                     ++ optionals withGui [ "--with-gui=qt4" ];
+
+  enableParallelBuilding = true;
+
+  meta = {
+    description = "A lite version of Bitcoin using scrypt as a proof-of-work algorithm";
+    longDescription= ''
+      Litecoin is a peer-to-peer Internet currency that enables instant payments
+      to anyone in the world. It is based on the Bitcoin protocol but differs
+      from Bitcoin in that it can be efficiently mined with consumer-grade hardware.
+      Litecoin provides faster transaction confirmations (2.5 minutes on average)
+      and uses a memory-hard, scrypt-based mining proof-of-work algorithm to target
+      the regular computers and GPUs most people already have.
+      The Litecoin network is scheduled to produce 84 million currency units.
+    '';
+    homepage = https://litecoin.org/;
+    platforms = platforms.unix;
+    license = licenses.mit;
+    broken = stdenv.isDarwin;
+    maintainers = with maintainers; [ offline AndersonTorres ];
+  };
+}